Planning The Parallel Scsi Configuration; Planning The Fibre Channel Configuration; Changing The Scsi Id - Sun Microsystems StorageTek SL48 Getting Started

6a Planning the parallel SCSI
configuration
If the Library has only one parallel SCSI drive and is
the only parallel SCSI device connected to the host
computer, or you will put each drive on its own parallel
SCSI bus, skip this step.
If you are unfamiliar with configuring parallel SCSI
devices, read the parallel SCSI configuration information
in the User and service guide on the documentation CD.
Follow these general guidelines when planning the
parallel SCSI configuration:
The LTO‐3 tape drive is an Ultra320 parallel SCSI
•
device. Only put one LTO‐3 tape drive on an
Ultra320 bus. Putting an LTO‐3 tape drive on a lower
performance bus will degrade its performance. Do
not connect an LTO‐3 drive to an SE SCSI bus because
it will seriously degrade performance.
• The LTO‐2 is an Ultra160 parallel SCSI device. Up to
two LTO‐2 tape drives can share an Ultra320 bus or
each tape drive can be on its own Ultra160 bus.
• Avoid putting the Library on the same SCSI bus as a
disk drive or SE device.
• The default SCSI ID of full‐height tape drives is 4.
The default SCSI ID of half‐height drives is 4 or 5,
depending on the location of the drive in the Library.
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6b Planning the Fibre Channel
configuration
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The Fibre Channel tape drive has two Fibre Channel
ports. Only one port may be used at a time, but
both ports can be connected for path failover if your
application supports path failover.
Direct connection
You will need a 2 Gb or 4 Gb Fibre Channel HBA.
SAN connection
All switches between the host and the Library must be
of the appropriate type. A 2 Gb switch in the path may
result in performance degradation when backing up
highly compressible data to a 4 Gb tape drive.
Configure zoning on the Fibre switch so only the backup
servers can access the Library.

7 Changing the SCSI ID

In a parallel SCSI Library, If you need to change the
SCSI ID for one or both of the tape drives, do so before
connecting the Library to the host computer.
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6.
7.
Power off the Library.
Page 6
Attach the power cord to the Library.
Power on the Library by pressing the power button
on the front panel.
Check the LCD screen to make sure the Library is
ready.
Use the control keys below the LCD screen to
highlight Configuration > Drives > Drive #, where # is
the number of the drive whose SCSI ID you need to
change. Press the OK key.
Press OK to select the editable block. Use the Up and
Down control keys to change the SCSI ID. Press OK
to select the value.
Highlight Save and press OK to save the SCSI ID.
Change the SCSI ID of the other drive if necessary.
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